Rolled paper wrapping apparatus

Abstract

A header heat plate for a large paper roll wrapping machine comprising a plurality of separate face plate sections that are mounted on a common backing plate to form a complete header plate for applying a roll header to an end of a paper roll. A roll header is temporarily held to the face plate sections through the application of a vacuum suction to openings in the face plate sections. Each face plate section includes heating elements integrally molded therein. These are heated to activate a heat sensitive adhesive contained on the roll side of the roll header. A wrapping paper is applied to the roll and crimped over interior roll headers inserted at the ends of the rolls. Grooves are cut along the side edges of the wrapping paper to reduce the amount of wrapping paper overlap and indentations in the ends of the paper rolls caused thereby.

I claim: 
     
       1. A header heat plate for a roll paper wrapping apparatus wherein a circular roll header is affixed to each end of a roll of paper by pressing the header against the end of the roll with a header plate, the improvement wherein the header heat plate is circular and is formed in a plurality of interchangeable arcuate header face plate sections mounted together edge to edge on a backing plate, the sections being individually changeable such that the entire header heat plate need not be replaced when one section becomes damaged or wears out and a single replacement arcuate section can be used to replace a plurality of sections of the header face plate. 
     
     
       2. A header heat plate according to claim 1 wherein the roll header is affixed to the roll by a heat sensitive adhesive and each header face plate section includes interior heating elements, the heating elements in the header face plate sections being heated by a power supply to a sufficient temperature to activate the thermal adhesive. 
     
     
       3. A header heat plate for a paper roll wrapping machine comprising: a plurality of face plate sections that fit together to form a complete face plate, the face plate sections comprising four nearly identically shaped face plate quadrants, the face plate quadrants being individually attached to and supported by a single back plate;   retaining means for temporarily holding a roll header to the face plate sections through the application of a vacuum suction through openings in the face plate sections; and   heating means for heating each face plate section by providing an electric current to the heating means.   
     
     
       4. A header heat plate for a roll paper wrapping apparatus wherein a circular roll header having a heat sensitive adhesive thereon is affixed to each end of a roll of paper by pressing the header against the end of the roll with a heated header plate, the improvement wherein the header heat plate is formed in a plurality of header face plate sections mounted together edge to edge on a backing plate, the sections being individually changeable such that the entire header heat plate need not be replaced when one section becomes damaged or wears out, each header face plate section including interior heating elements, the heating elements in the header face plate sections being heated by a power supply to a sufficient temperature to activate the thermal adhesive, each header face plate section being molded out of metal and the interior heating elements being integrally molded therein, the heating elements having an externally accessible terminal that is connectable to the power supply to heat the section. 
     
     
       5. A header heat plate according to claim 4 wherein each face plate section includes vacuum openings therethrough and the apparatus includes vacuum means for drawing a vacuum through the openings such that roll headers are held to the header plate by vacuum prior to being pressed on the ends of the paper rolls. 
     
     
       6. A header heat plate for mounting a roll header on the end of a paper roll comprising: a face plate having a generally planar front face, said face plate being formed from a plurality of generally identically shaped sections, each section having a plurality of vacuum holes therethrough and further including a plurality of electrically resistive heating elements cast within the header plate section, the heating elements having electrical leads extending to the exterior of the header plate section;   a back plate having a front face connected to and supporting each of the identical sections;   an insulation barrier mounted to a rear face of each heat plate section between the face plate and the back plate so as to contain the heat produced by the electrically resistive heating elements within the face plate; and   means for mounting the header heat plate to a header plate mount of a paper roll wrapping machine.   
     
     
       7. A header heat plate for a roll paper wrapping apparatus wherein a circular roll header is affixed to each end of a roll of paper by pressing the header against the end of the roll with a header plate, the improvement wherein the header heat plate is formed in a plurality of header face plate sections mounted together edge to edge on a backing plate, the sections being individually changeable such that the entire header heat plate need not be replaced when one section becomes damaged or wears out, the header heat plate having a core recess therein that accommodates a roll core or core plug that extends beyond the end of the paper in the roll, such that the header plate can be pressed against the paper while the core or core plug extends into the core recess in the header heat plate, the core recess being elongated in a vertical direction so as to accommodate the cores of paper rolls of different diameters. 
     
     
       8. A header heat plate for a paper roll wrapping machine wherein the header heat plate comprises: a face plate comprising a plurality of separate face plate sections angularly spaced about a common axis, the face plate sections being formed of molded metal and including electrical heating elements molded integrally therein, the face plate sections having exterior electrical terminals to connect the heating elements to a power supply, each face plate section including a plurality of vacuum holes therethrough for drawing a vacuum at the surface of the face plate;   a layer of insulation behind each section of the face plate; and   a common backing plate positioned behind the face plates and insulation, the face plate sections and insulation being bolted to the backing plate,   the header heat plate assembly being attached to a header plate mount for the roll wrapping machine, the header plate mount having vacuum means for drawing a vacuum through vacuum holes formed through the back plate and insulation which are in communication with the vacuum holes in the face plate, the mount being axially movable to press the header heat plates inwardly against the ends of a roll of paper placed between a pair of opposed header plates and header plate mounts, the header heat plates retaining roll headers thereto by vacuum and heating and pressing the roll headers against the ends of the paper rolls, the roll headers having heat sensitive adhesive thereon that causes the roll headers to stick to the ends of the rolls when heated and pressed on the rolls by the header heat plates.